Synthesis and Structural Characterization of Hydroxyapatite-Wollastonite Biocomposites, Produced by an Alternative Sol-Gel Route  

作　　者：Martín A. Encinas-Romero Jesús Peralta-Haley Jesús L. Valenzuela-García Felipe F. Castillón-Barraza 

机构地区：[1]Centro de Nanociencias y Nanotecnología, Uni- versidad Nacional Autónoma de México, Ensenada B.C., México. [2]Departamento de Ingeniería Química y Metalurgia, Universidad de Sonora, Hermosillo, México [3]Posgrado en Ciencias de la Ingeniería: Ingeniería Química, Universidad de Sonora, Hermosillo, México

出　　处：《Journal of Biomaterials and Nanobiotechnology》2013年第4期327-333,共7页生物材料与纳米技术（英文）

摘　　要：Hydroxyapatite is a type of calcium phosphate-based material with great interest for biomedical applications, due to the chemical similarity between this material and the mineral part of human bone. However, synthetic hydroxyapatite is essentially brittle;the practice indicates that the use of hydroxyapatite without additives for implant production is not efficient, due to its low strength parameters. In the present work, biocomposites of hydroxyapatite-wollastonite were synthesized by an alternative sol-gel route, using calcium nitrate and ammonium phosphate as precursors of hydroxyapatite, and high purity natural wollastonite was added in ratios of 20, 50 and 80 percent by weight immersed in aqueous medium. Formation of hydroxyapatite occurs at a relatively low temperature of about 350?C, while the wollastonite remains unreacted. After that, these biocomposites were sintered at 1200?C for 5 h to produce dense materials. The characterization techniques demonstrated the presence of hydroxyapatite and wollastonite as unique phases in all products.Hydroxyapatite is a type of calcium phosphate-based material with great interest for biomedical applications, due to the chemical similarity between this material and the mineral part of human bone. However, synthetic hydroxyapatite is essentially brittle;the practice indicates that the use of hydroxyapatite without additives for implant production is not efficient, due to its low strength parameters. In the present work, biocomposites of hydroxyapatite-wollastonite were synthesized by an alternative sol-gel route, using calcium nitrate and ammonium phosphate as precursors of hydroxyapatite, and high purity natural wollastonite was added in ratios of 20, 50 and 80 percent by weight immersed in aqueous medium. Formation of hydroxyapatite occurs at a relatively low temperature of about 350?C, while the wollastonite remains unreacted. After that, these biocomposites were sintered at 1200?C for 5 h to produce dense materials. The characterization techniques demonstrated the presence of hydroxyapatite and wollastonite as unique phases in all products.

关 键 词：HYDROXYAPATITE WOLLASTONITE BIOCERAMICS BIOCOMPOSITES SOL-GEL 

分 类 号：TB3[一般工业技术—材料科学与工程]